syzbot


kernel BUG in dnotify_free_mark

Status: upstream: reported C repro on 2023/07/30 07:52
Bug presence: origin:upstream
Labels: missing-backport
[Documentation on labels]
Reported-by: syzbot+2f4aa3239150dd006e44@syzkaller.appspotmail.com
First crash: 954d, last: 1h44m
Fix commit to backport (bisect log) :
tree: upstream
commit 4ad5c924df6cd6d85708fa23f9d9a2b78a2e428e
Author: Konstantin Komarov <almaz.alexandrovich@paragon-software.com>
Date: Fri Sep 22 10:07:59 2023 +0000

  fs/ntfs3: Allow repeated call to ntfs3_put_sbi

  
Bug presence (3)
Date Name Commit Repro Result
2023/10/28 linux-6.1.y (ToT) 32c9cdbe383c C [report] kernel BUG in dnotify_free_mark
2023/07/30 upstream (ToT) d31e3792919e C [report] kernel BUG in dnotify_free_mark
2023/10/28 upstream (ToT) 2af9b20dbb39 C Didn't crash
Similar bugs (3)
Kernel Title Rank 🛈 Repro Cause bisect Fix bisect Count Last Reported Patched Status
upstream kernel BUG in dnotify_free_mark ntfs3 -1 C error done 22993 211d 1228d 29/29 fixed on 2025/11/17 09:14
linux-5.15 kernel BUG in dnotify_free_mark missing-backport origin:upstream -1 C done 608 10d 600d 0/3 upstream: reported C repro on 2024/07/18 09:21
linux-6.6 kernel BUG in dnotify_free_mark origin:lts-only -1 C inconclusive 137 35d 224d 0/2 upstream: reported C repro on 2025/07/29 04:21
Fix bisection attempts (2)
Created Duration User Patch Repo Result
2023/11/23 13:40 3h54m fix candidate upstream OK (1) job log
2023/09/29 04:09 1h18m bisect fix linux-6.1.y OK (0) job log log
marked invalid by web-security-scanner@google.com

Sample crash report:
------------[ cut here ]------------
kernel BUG at fs/notify/dnotify/dnotify.c:136!
invalid opcode: 0000 [#1] PREEMPT SMP KASAN
CPU: 0 PID: 11 Comm: kworker/u4:1 Not tainted 6.1.128-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 12/27/2024
Workqueue: events_unbound fsnotify_mark_destroy_workfn
RIP: 0010:dnotify_free_mark+0x53/0x60 fs/notify/dnotify/dnotify.c:136
Code: 48 89 df e8 8f e4 dd ff 48 83 3b 00 75 17 e8 f4 8d 86 ff 48 8b 3d 1d b9 9c 0c 4c 89 f6 5b 41 5e e9 92 0d dd ff e8 dd 8d 86 ff <0f> 0b cc cc cc cc cc cc cc cc cc cc cc 55 41 57 41 56 41 55 41 54
RSP: 0018:ffffc90000107b88 EFLAGS: 00010293
RAX: ffffffff82040513 RBX: ffff88807cfef080 RCX: ffff888017febb80
RDX: 0000000000000000 RSI: ffffffff8b0c1d20 RDI: ffff88807cfef000
RBP: ffffc90000107c50 R08: dffffc0000000000 R09: fffffbfff2256864
R10: 0000000000000000 R11: dffffc0000000001 R12: ffff8881462db000
R13: ffffc90000107be0 R14: ffff88807cfef000 R15: ffff88807cfef000
FS:  0000000000000000(0000) GS:ffff8880b8e00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f36b7d95ed8 CR3: 000000007f94a000 CR4: 00000000003506f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 <TASK>
 fsnotify_final_mark_destroy fs/notify/mark.c:304 [inline]
 fsnotify_mark_destroy_workfn+0x2c7/0x340 fs/notify/mark.c:928
 process_one_work+0x917/0x1260 kernel/workqueue.c:2292
 worker_thread+0xa47/0x1200 kernel/workqueue.c:2439
 kthread+0x28d/0x320 kernel/kthread.c:376
 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:295
 </TASK>
Modules linked in:
---[ end trace 0000000000000000 ]---
RIP: 0010:dnotify_free_mark+0x53/0x60 fs/notify/dnotify/dnotify.c:136
Code: 48 89 df e8 8f e4 dd ff 48 83 3b 00 75 17 e8 f4 8d 86 ff 48 8b 3d 1d b9 9c 0c 4c 89 f6 5b 41 5e e9 92 0d dd ff e8 dd 8d 86 ff <0f> 0b cc cc cc cc cc cc cc cc cc cc cc 55 41 57 41 56 41 55 41 54

Crashes (2459):
Time Kernel Commit Syzkaller Config Log Report Syz repro C repro VM info Assets (help?) Manager Title
2025/02/19 13:20 linux-6.1.y 0cbb5f65e52f 9a14138f .config console log report syz / log C [disk image] [vmlinux] [kernel image] [mounted in repro] ci2-linux-6-1-kasan kernel BUG in dnotify_free_mark
2024/11/09 12:28 linux-6.1.y d7039b844a1c 6b856513 .config console log report syz / log C [disk image] [vmlinux] [kernel image] [mounted in repro] ci2-linux-6-1-kasan kernel BUG in dnotify_free_mark
2024/04/20 03:45 linux-6.1.y 6741e066ec76 af24b050 .config console log report syz C [disk image] [vmlinux] [kernel image] [mounted in repro] ci2-linux-6-1-kasan kernel BUG in dnotify_free_mark
2023/07/30 07:52 linux-6.1.y d2a6dc4eaf6d 92476829 .config console log report syz C [disk image] [vmlinux] [kernel image] [mounted in repro] ci2-linux-6-1-kasan kernel BUG in dnotify_free_mark
2025/12/28 13:03 linux-6.1.y 50cbba13faa2 d6526ea3 .config console log report syz / log C [disk image] [vmlinux] [kernel image] [mounted in repro] ci2-linux-6-1-kasan-arm64 kernel BUG in dnotify_free_mark
2025/12/23 05:45 linux-6.1.y 50cbba13faa2 d6526ea3 .config console log report syz / log C [disk image] [vmlinux] [kernel image] [mounted in repro] ci2-linux-6-1-kasan-arm64 kernel BUG in dnotify_free_mark
2026/03/10 16:14 linux-6.1.y f2ddafa93a25 4683d576 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan kernel BUG in dnotify_free_mark
2026/03/10 03:25 linux-6.1.y f2ddafa93a25 6972f302 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan kernel BUG in dnotify_free_mark
2026/03/09 16:17 linux-6.1.y f2ddafa93a25 176bead5 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan kernel BUG in dnotify_free_mark
2026/03/07 02:15 linux-6.1.y f2ddafa93a25 5cb44a80 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan kernel BUG in dnotify_free_mark
2026/03/06 13:52 linux-6.1.y f2ddafa93a25 41d8037d .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan kernel BUG in dnotify_free_mark
2026/03/06 02:12 linux-6.1.y f2ddafa93a25 31e9c887 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan kernel BUG in dnotify_free_mark
2026/03/06 02:12 linux-6.1.y f2ddafa93a25 31e9c887 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan kernel BUG in dnotify_free_mark
2026/03/05 18:52 linux-6.1.y f2ddafa93a25 d20b04c8 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan kernel BUG in dnotify_free_mark
2026/03/05 13:41 linux-6.1.y 2f66dd9cff42 d20b04c8 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan kernel BUG in dnotify_free_mark
2026/03/05 01:46 linux-6.1.y 2f66dd9cff42 a9fe5c9e .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan kernel BUG in dnotify_free_mark
2026/03/05 01:46 linux-6.1.y 2f66dd9cff42 a9fe5c9e .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan kernel BUG in dnotify_free_mark
2026/03/04 16:23 linux-6.1.y 2f66dd9cff42 e6b6b96b .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan kernel BUG in dnotify_free_mark
2026/03/04 13:55 linux-6.1.y 779f9571ac3e e6b6b96b .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan kernel BUG in dnotify_free_mark
2026/03/03 15:14 linux-6.1.y 779f9571ac3e 4180d919 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan kernel BUG in dnotify_free_mark
2026/03/03 02:45 linux-6.1.y 779f9571ac3e 28b83e23 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan kernel BUG in dnotify_free_mark
2026/03/02 14:58 linux-6.1.y 779f9571ac3e b9dd6534 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan kernel BUG in dnotify_free_mark
2026/02/28 04:55 linux-6.1.y 779f9571ac3e 43249bac .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan kernel BUG in dnotify_free_mark
2026/02/28 04:55 linux-6.1.y 779f9571ac3e 43249bac .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan kernel BUG in dnotify_free_mark
2026/02/27 17:45 linux-6.1.y 779f9571ac3e 2cf092b8 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan kernel BUG in dnotify_free_mark
2026/02/27 02:17 linux-6.1.y 779f9571ac3e a2f13f71 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan kernel BUG in dnotify_free_mark
2026/02/26 13:30 linux-6.1.y 779f9571ac3e ffa54287 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan kernel BUG in dnotify_free_mark
2026/02/26 01:39 linux-6.1.y 779f9571ac3e e0f78d93 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan kernel BUG in dnotify_free_mark
2026/02/25 13:24 linux-6.1.y 779f9571ac3e 94a9671e .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan kernel BUG in dnotify_free_mark
2026/02/25 13:24 linux-6.1.y 779f9571ac3e 94a9671e .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan kernel BUG in dnotify_free_mark
2026/02/25 01:36 linux-6.1.y 779f9571ac3e 787dfb7c .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan kernel BUG in dnotify_free_mark
2026/02/24 12:43 linux-6.1.y 779f9571ac3e 96b1aa46 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan kernel BUG in dnotify_free_mark
2026/02/24 00:22 linux-6.1.y 779f9571ac3e 41d2fa6a .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan kernel BUG in dnotify_free_mark
2026/02/23 12:49 linux-6.1.y 779f9571ac3e 6beca497 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan kernel BUG in dnotify_free_mark
2026/02/23 12:49 linux-6.1.y 779f9571ac3e 6beca497 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan kernel BUG in dnotify_free_mark
2026/02/20 20:25 linux-6.1.y 779f9571ac3e 6e7b5511 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan kernel BUG in dnotify_free_mark
2026/02/20 08:09 linux-6.1.y 779f9571ac3e 17d780d6 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan kernel BUG in dnotify_free_mark
2026/02/19 20:30 linux-6.1.y 779f9571ac3e c8d8c52d .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan kernel BUG in dnotify_free_mark
2026/02/19 06:07 linux-6.1.y 8ce36b2849ef 746545b8 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan kernel BUG in dnotify_free_mark
2026/02/18 17:38 linux-6.1.y 8ce36b2849ef 77d4d919 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan kernel BUG in dnotify_free_mark
2026/02/18 17:35 linux-6.1.y 8ce36b2849ef 77d4d919 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan kernel BUG in dnotify_free_mark
2026/02/18 05:44 linux-6.1.y 8ce36b2849ef 39751c21 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan kernel BUG in dnotify_free_mark
2026/02/17 17:29 linux-6.1.y 8ce36b2849ef 06ec4f7b .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan kernel BUG in dnotify_free_mark
2026/02/17 05:17 linux-6.1.y 8ce36b2849ef e439b951 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan kernel BUG in dnotify_free_mark
2026/02/16 17:20 linux-6.1.y 8ce36b2849ef 5d52cba5 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan kernel BUG in dnotify_free_mark
2026/02/13 19:09 linux-6.1.y 8ce36b2849ef 1e62d198 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan kernel BUG in dnotify_free_mark
2026/02/13 06:45 linux-6.1.y 8ce36b2849ef 6a673c50 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan kernel BUG in dnotify_free_mark
2026/02/12 18:16 linux-6.1.y 8ce36b2849ef 504cb1bf .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan kernel BUG in dnotify_free_mark
2026/02/12 02:19 linux-6.1.y 8ce36b2849ef 76a109e2 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan kernel BUG in dnotify_free_mark
2026/02/11 18:13 linux-6.1.y 8ce36b2849ef 75707236 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan kernel BUG in dnotify_free_mark
2026/02/03 01:38 linux-6.1.y cd9b81672742 d78927dd .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan-arm64 kernel BUG in dnotify_free_mark
* Struck through repros no longer work on HEAD.